These mechanical music playing devices that were devised by people with way too much time on their hands. Unlike the old calliopes and hurdy-gurdy machines, these are pretty ugly. As for the music? Have you every heard a washing machine with a bunch of marbles? However, I do love the Animusic bug player.
"Musical instrument makers have always been fascinated by pushing the boundaries of their craft, and several creative individuals have created automated musical instruments that play without the need of a human performer. Belgian composer, performer, and instrument maker Godfried-Willem Raes has invented a huge number of bizarre and offbeat instruments during his career. Many of them are unusual instrument/robot hybrids capable of being controlled by computers."
Implications - Though it is an age-old industry, music and entertainment has seen and will continue to see many reinventions as time passes.